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Power supplies and other utilities in Britain were hacked by state-sponsored cyber criminals during last month's general election, according to a document from the U.K.'s electronic spy agency GCHQ that was obtained by the tech news site Motherboard.

Some infrastructure systems “are likely to have been compromised” but no supplies were affected, GCHQ said in the document. There is no suggestion the election was affected.

NBC News has not been able to verify the contents of the document, reportedly produced by the agency’s National Cyber Security Centre.

The report comes after U.S. officials said that Russia was likely behind recent intrusions at American power plants.

Parkland Shooting Survivor Calls 'BS' on Politicians' Gun Stance

Marjory Stoneman Douglas High Sophomore Emma Gonzales had a message for president Donald Trump and for other politicians on their failure to enact sensible gun laws: "BS." Gonzales was one of several survivors to speak at a rally held outside the Federal Courthouse in Fort Lauderdale, Florida, to speak out against the gun lobby.